LEISTUNGSVERSORGUNG UND ÜBERTRAGUNG

摘要

PCT No. PCT/IB96/00090 Sec. 371 Date Oct. 16, 1996 Sec. 102(e) Date Oct. 16, 1996 PCT Filed Feb. 6, 1996 PCT Pub. No. WO96/25786 PCT Pub. Date Aug. 22, 1996A power-supply and communication circuit is based on a flyback converter with a transformer (6) whose primary winding (10) is periodically connected to a supply voltage by means of a switching element (8) in the rhythm of control pulses from an oscillator (24). Data communication to the secondary electronic circuitry (4) is effected by interrupting the control pulses in response to a first data signal (SDTA1) to be transmitted. The absence of the alternating voltage across the secondary winding (18) is detected by means of a peak detector (28) and converted into a received first data signal (RDTA1). Data communication to the primary electronic circuitry (2) is effected by actively modulating the rectified voltage at the secondary side by means of a modulator (30) in response to a second data signal (SDTA2) to be transmitted. The resulting fluctuations in the flyback voltage across the primary winding are detected by means of a second peak detector (32) and converted into a received second data signal (RDTA2).